taliaferro



T. L. TALIAFERRO.

DRYING OVEN.

APPLICATION FILED JAN-3.1919.

Patented Oct. 7, 1919.

3 SHEETS-SHEET I.

T. L. TALIAFERRO.

DRYING OVEN.

APPLICATION FILED JAN.3.19I9.

1,318,187. Patented Oct. 7,1919.

3 SHEETSSHEET 2.

illi

' particularly to a UNITED STATES PATENT. onsta THOMAS LUCIEZN' TALIAIEZBBO, OF CHICAGO, ILLINOIS, ASSIGNOREO RHOENIX HEBMETIC COMPANY,OF CHICAGO, ILLINOIS, A CORPORATION OF NEW YORK.

Danna-oven.

Specification of Letters Patent.

' Patented 0a. 7,1919.

Application filed January 3, 1919. Serial in. 269,452.

.To all whom it may concern:

Be it known that I, THOMAS LUCIEN TALIAFERRO, a citizen of -the UnitedStates, residing at Chicago, in the county of Cook, State of Illinois,have invented certain new and useful Improvements in Drying-Ovens, ofwhich the following is a description, reference being had to theaccompanying drawing and to the figures of reference marked thereon.

The invention relates to new and useful improvements in dr ing ovens,and more rying oven whlch is adapted to dry lacquered or. coated sheetsof metal.

An object of the invention is to provide a drying oven which shall be ofcomparatively few parts and of simple construction and at the same timethe drying efficiency of the oven maintained.

A further object of the invention is to provide a drying oven whereinthe casing forming a greater portion of the ,oven is made of corrugatedmetal covered with heat insulating material in such a way as to form aircells forincreasing the heat insulating efliciency of the oven.

A further object of the invention is to provide a novel means ofsupporting the casing on the frame work, so that 1t may be firmlyattached to the frame work in a very simple and eflicient manner.

A still further object of the invention is to provide a heating ovenofthe above type, wherein the sheets of metal to be dried may be carriedthrough the oven by an endless carrier supported within the oven so asto move horizontally as it carries its load and wherein the drying airor gases are conducted in and about the sheets so as to bring about aneflicient drying and baking of the coating on the sheets.

These and other objects will in part be obvious and will in part behereinafter more fully disclosed.

In the drawings which show by way of illustration one embodiment of theinvention Figure 1 is a side view of an oven having my improvementsembodied therein;

Fig. 2 is a longitudinal sectional view through a portion (if the oven,on an enlarged scale;

Fig. 2* is a detail "in section showing a portion of the corrugatedcasing and the heat insulating material applied thereto;

Fig. 3 is a transverse through the oven;

sectional view Fig. 4 is a view similar to Fig. 3, butshowmg a slightlymodified form of the invention.

In carrying out my invention, I have provided a supporting frame onwhich the oven proper is mounted. The oven cons'ists of an elongatedcasing which is preferably circular in cross section and which is madeof sheet metal corrugated so that the corrugations lie in transverseplanes.

passing through the oven. At the upper end of the frame are angularbrackets which are rlgldly attached to the frame and these angularbrackets serve as seats for the lower edge of the metal casing formingthe oven. On the outer face of the porrugated metal is placed aninsulating material which ongages only the, extreme outer parts of themetal so as to form between the corrugated metal and the heat insulatingmaterial air cells which greatly increases the heat insulatingefliciency of the oven. Each end of the oven is closed with an end plateexcept for an opening sufliciently large to permit an endless carrier tocarry the sheets into,

through and out of the oven. Mounted on the frame is a pan which closesthe bottom of the oven. At, suitable places in the lower region of theoven are burners or other suitable heating means, so that the drying airwhich is circulated through the oven may-be raised to a propertemperature to and they are connected adjacent their upper I ends byangle brackets 4-4 which extend from end to end of the oven; Mounted onthese angle brackets 44 is an elongated casing 5 which is formed ofcorrugated metal. The casing is circular in cross seetion and thecorrugations lie in planes ex-.

tending transversely of the casing. The,

lower ends of the casing 5 are mounted on the respective brackets 4-4and are secured thereto in any suitable way.

losed by a pan 9 to end of the oven Covering the metal casing 5 is alayer of heat insulating material 6 formed of asbestos or any othersuitable material and this layer of heat insulating material comes intocontact with the outer 'faces 7 of the corrugations in. the casing 5,see Fig. 2. As a resultthere are a serles of air cells 8 formed betweenthe metal casing and the heat insulating material. Inasmuch as the heatinsulating material only lies against the extreme points of thecorrugations, these air cells extend throughout a greater portion of theouter surface of the casing, and the air cells form a very eflicientheat insulating means for preventing the heat of the over'f'from escaing through the s1de walls of the oven. T e lower part of the oven iswhich extends from end and is formed with side walls 10-10 which extendupwardly and are preferably bent over the angle brackets 4 4. Mounted oneach leg 2-2 is an m wardly projecting bracket 11 and the s1de walls 10of the pan extend from one bracket 11 to the next adjacent bracket.

The sheets to be dried are carried through the oven by an endlesscarrier 12 whlch is in the form of two endless chains having attached toeach link a rigidly extendlng arm 13 between which the sheets areplaced. These arms 13 extend vertically as they pass through the oven,as will appear from Fig. 1 of the drawings and the sheets being placedbetween the adjacent arms will be carried invertical position throughthe oven. Mounted on the brackets 11-11 are rods 14. There is one rod ateach side of the conveyer 12 and the conveyer links rest on these rodswhich serve as a supporting means to hold the conveyer horizontal as itpasses through the oven. The oven is closed by end walls 15, each ofwhich is formed with an opening 16 of sufficient size to permit thesheets to pass into, through and out of the oven.

As a means for heating the oven, I have. provided steam pipes 17 andsteam may be admitted, through the pipe 18 and discharged through thepipe 19. These steam pipesare located directly above the pan 9. Mountedon the brackets 11,11 are horizontal partitions 20, which serve to closeoff the upper part of the oven from the lower part, so that thecirculating air or gases will pass up through the conveyer in and aboutthe sheets carried thereby. As a means for circulating the air throughthe oven, I have provided intakes 21 and located in each intake is aburner 22 which heats the air and causes it to rapidly rise through theintake. I also provide each intake with a spray nozzle 23, whereby aspray of steammay be introduced with the air to temper the air. At anumber of places throughout the oventhere are outlets 24, which areconnected with a ventilating drum 25, which in turn-may be connected toa suitable stack. The air passes up through the oven and outthrough theoutlet openings into the drum and thence to the stack.

It will be understood, of course, that other means for causing the airto circulate through the oven ma be used without departing from thespirit of the invention and other devices for heating the air may besubstituted for those referred to above.

In Fig. 4 of the drawings, I have shown a slightly modified form ofheating means for the oven. In this form of the invention there arecurved artitions 26 which are substantially parallel with the casing 5,and there is one at each side of the oven. These partitions extendupwardly to a point well above the sheets which are to be dried. In thespaceformed by the partitions and at each side of the oven there is agas burner 27 which extends longitudinally of the oven. Extendingthrough the side walls of the oven are openings 28 through which air maypass into the space between the partitions and the casing where it isheated and thus caused to rise into the upper part of the oven. The topof the oven is closed and the air will therefore pass down between thesheets into the lower part of the oven and thence through an outlet 29into a receiving chamber 30, which may be connected with the stack. Bythis arrangement of the heating devices, the sheets are subjecteddirectly to the influence of the dry heated ases and also indirectly tothe heat radiating from the artitions 26.

From the a ove, it will be apparent that I have provided. an oven whichconsists of very few parts and which is very simple in construction, thegreater portion of the oven cons1st1ng of sectlons of sheet metal curvedand corrugated and resting on the angle brackets where the sectionsarefirmly held. The remainder of the oven consists of the supportingframe, the pan for closing the bottom of the oven and the end walls withopenings through which the sheets are carried into the oven and out ofthe oven after they are dried. These parts maybe very cheaply made andwhen assembled form a very eflicient oven. The covering of thecorrugated metal with the heat insulating materlal forming the air cellsprovides a heat insulating means which is very much more eflicient thancould be accomplished by the use of the heat insulating material alone,and, furthermore, these air cells are formed with little or no extraexpense in the construction of the oven except for the corrugating ofthe sheets which form the structlon of casing and arrangement of heatthe-heat of the air or gases coming directly in contact with the coatedsurfaces causing the particles of the lacquer to be thoroughly fused oramalgamated, thus forming a hard protecting surface on the metal.

and having its ends resting on and secured;

to said angular brackets, a heat insulating material covering saidcasing and contacting with the extreme outer portions only of thecorrugations, a pan extending fromend to end of the ovencarried by theframe and closing the lower part of the oven, end plates for closing theends of the oven,-fsaid end plates having openings formed therethroughto permit the lacquered sheets to'be carried into and out ofthe oven, anendless conveyer for carrying the sheets in vertical While I havereferred to my'oven as a q)osition through the oven, and means fordrying oven, it will be understood that, in connection with drying oflacquered sheets of'metal, it is more particularly a baking oven and themaintaining of the heated gases at a uniform temperature is verymaterial to the eflicient carrying out of the process of baking thelacquer. By my improved coninsulating material, I am able to secure .aproper temperature for baking the lacquer in an efficient manner andalso to maintain said temperature substantially uniform throughout theentire region of the oven.-

It is obvious that minor changes in the details of construction. and thearrangement of the parts may be made without departing from the spiritof the invention as set forth in the appended claims.

Having thus described my invention, what I claim as new and desire tosecure Letters Patent, is:

1. An oven for baking lacquered sheets comprising a supporting frame, anelongated casing of corrugated metal having corrugations extendingtransversely of the casing,

said corrugations being curved in cross seccomprising a supportingframe, an elongated casing of corrugated metal substantially circular incross section and having thecorrugations extending transversely of thecasing, heat insulating material'covering said casing and contactingwith the extreme outer portions only of the corrugations, whereby aplurality of aircells are formed between the'met-al and the heatinsulating covering material, and means for heating the interior of saidoven.

3. An oven for baking lacquered sheets comprising a supporting frame, anangle bracket extending longitudinally of the oven at each side of theupper part of the frame, an elongated casing of corrugated metal, saidcasing being circular in cross section comprising a supporting frame,angular brackets at each side of the frame at the upper ends thereof, anenlongated casin'g of oven and carried 'by' said frame, .said pan'having side walls extending upwardly to said anglilanbrackets,horizontal partitions within said oven, the inner edges of.saidpartitions being spaced from each other, brackets within the ovencarrying said partitions, end walls-for closing the oven, each end wallhaving-an opening through which the lacquered sheets are adapted to ass,an

endless conveyer passing through t e oven, rods carried by the bracketswithin the oven' and supporting the endless conveyer, andmeans forheatlng the interior of the oven. 5. An oven for baking lacquered sheetscomprising a supporting frame, an angle bracket extending longitudinallyof the oven at each side of the upper part of the frame, an elongated,casing of corrugated metal, said caslng being circular in cross sectionand having its ends resting on and secured to said angular brackets, aheat insulating material covering said casing and contact-' ing with theextreme outer portions only of the corrugations, a pan extending fromend to end of the oven carriedby the frame and closing the lower part oftheoven, end.

plates. forclosing the ends of the oven, said end plates having openingsformed therethrough to permit the lacquered sheets to be carried intoand out of the oven, an endless conveyer for carrying the sheetsinvertical position through the oven, means for heating the interior. ofthe oven, means foradmitting air to the lower part of the oven, andmeans whereby the heated air is taken ofl at the upper part of the oven.

6. An oven for baking lacquered sheets comprising a supporting frame,.angular brackets at each side of the frame at the upper ends thereof,an elongated casingof corrugated metal, said casing-being circular incross section and having its ends resting upon the angular brackets andsecured there- 'to, a heat insulating material covering said casing andcontacting with the extreme outer portions only of the corrugations,a-pan extending from end to end of the oven and carried by said frame,said pan havingtside walls extending upwardly to said angular brackets,horizontal partitions within said oven, the inner edges of saidpartitions being spaced from each other, brackets within the ovencarrying said partitions, end walls for closing the oven, each end wallhavin an opening through which the lacquered sheets are adapted to pass,an endless con' veyer passing through the oven, rods carrled by thebrackets Within the oven and support ng said endless conveyer, means forheating the interior of the oven, means for admitting air to the lowerpart of the oven, and means whereby the heated air is taken oil at theupper part of the oven.

In testimony whereof, I aflix my signature.

THOMAS LUGIEN TALIAFERRO.

